Toss squash with balsamic vinegar; transfer to a greased medium baking sheet. Bake in preheated 425°F oven 15-20 minutes or until heated through.
Meanwhile, in large skillet, heat oil over high heat. Add onions and apples; sauté about 4 minutes.
Reduce heat; continue sautéing until caramelized (about 10-12 minutes). Add half & half, garlic and 1 tablespoon sage; salt and pepper to taste. Simmer 5 minutes or until sauce has thickened.
Prepare pizza dough according to crispier crust package directions; top with caramelized onion mixture, butternut squash and cheeses. Continue baking according to package directions.
Remove from oven and top with remaining sage.